Operating systems

Spindown is a daemon to spin down idle disks and
thus save energy and give the disks a longer
lifetime. It also works with USB disks and
hot-swappable disks because it uses the device ID
to identify the disk instead of the device name
(such as hda or sdb). This means that it doesn't
matter if the disk is swapped while the daemon is
running.

A daemon to monitor sensors and power supplies, scan processes to match the command name, and on the basis of this change cpufreq policy and put CPUs in an offline state, configurable in Lua and using fuzzy logic rules.

Deskolo is a client/server system for gathering data about and managing computer power consumption. It allows you to switch systems off when there is no user activity outside of pre-defined activity periods, and back on again using Wake-on-LAN packets.